add first uncle test
add first uncle test

vaporry/solidity,arkpar/solidity,douglas-larocca/solidity,ethers/solidity,debris/solidity,ruchevits/solidity,chriseth/solidity-doc-test,shahankhatch/solidity,ruchevits/solidity,gluk256/solidity,chriseth/solidity,ruchevits/solidity,LianaHus/solidity,ruchevits/solidity